05 wr450, ALL the mods plus JD jetting kit and pro circuit 496 can. runs like a scalded dog once i get it started the first time. fuel screw set at 2 turns out, have tried 1.5 and 2.5 turns out but doesn't help. it requires the use of the cold start circiut after it's warned up to restart it. the question is... do i need to go to a fatter pilot jet?